Knife-switch.



No. 695,l88. Patented Mar, 1:, 1902.

.1. A. WRIGHT & w. F. ONE'ILL.

KNIFE SWITCH.

(Application filed July 12, 1901.)

(No Model.)

WITNESSES THE nunms PETKRS cu, PHOYOLI'II'HD,WASHINGYON, n. c.

Unitarian dramas Pa ramer @rnrcn.

JOHN A. WRIGHT, on IRWINPAND WILLIAM F. ONEILL, on ivnmnsnnne,

- PENNSYLVANIA.

KNIFE SWITCH.

SEEQIFKGATTQN part of Letters Eatent No, 695,188, dated March 1 1, 1902.

Application filed July 12,1901. Serial No. 63,015. (No model.)

To all, whom it may concern:

Be it known that we, JOHN A. WRIGHT, residing at Irwin, in the county of Westmoreland, and WILLIAM F. ONEILL, residing at Wilkinsburg, in the county of Allegheny,

had therein to the accompanying drawings.

This invention relates to knife-switches,

and more particularly toimprovements on the switch patented to John A. right December 4, 1900, No. 663,209.

The primary object is to provide a double blade of simple and improved construction and also to provide improved means for securing the blade to the handle or handle cross bar, whereby said parts are rigidly 2o united and the rigidity maintained without danger of loosening.

The invention consists in the novel features of construction and in the combination and arrangement of parts hereinafter fully described and claimed, and illustrated by the accompanying drawings, wherein Figure 1 is a plan view, and Fig. 2 a side elevation, of a switchconstructed in accordance with our invention, both views being 0 partly in section. Fig. 3 is a plan view, partly in section, of a single-blade switch provided with our improvement. Fig. 4 is a detail view of one of the blade members. Fig. 5 is an end elevation of a two-blade handle-bar shown partly in section.

Referring to the drawings, 2 represents the base, and 3 the contact-posts, the latter being preferably of the form shown in the patent to John A. Wright, before referred to. Each of the switch-blades is double, being formed of two parallel members 4, hinged to one of contacts 3 at 5 in the usual manner. The swinging ends of the blade members are bulged oppositely at 6, and the extremities 7 thereof are brought flatly together, being outwardly disposed in line with the longitudinal center of the double blade. In the two-blade switch shown in Figs. 1 and 2 the blade extremities 7 enter a vertical notch 8, formedin the inner face of crossbar 8, to which handle 9 is secured. In the single-blade switch of Fig. 3 the handle 10 is notched to receive said projections. In both constructions the blade extremities 7 are longitudinally apertured or notched at 11, so that when the blade members are placed together these apertures or notches foign a wayfor securing screw 12, and the bulges 6 provide space for the securingnut 12'. Said bulges also add resilience to the blade members and cause the latter and the contacts to eotiperate in a most effective manner. W'ith the blade and handle elements thus interlocked it is practically impossible for the same to work loose or for the handle or handle cross-bar to turn on the blades. slacken or become loose said parts could not work loosely one upon the other. The blade members thus constructed are very simple of manufacture and may be readily assembled and at the same time are thoroughly interchangeable.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

l. The combination of a double switch blade bulged in opposite directions at its'handle end, said double blade having a projecting part outside of the bulge, and a handle member notched to receive said projection, substantially as shown and described.

2. The combination of a double switchblade oppositely bulged at its handle end and formed with a central longitudinal projecting portion outside of the bulge, said projecting portion being longitudinallyapertured,ahandle member formed with a notch to receive the blade projection, and a securing-screw eX tending through the aperture of the blade projection and uniting the blade and handle member, substantially as shown and described.

3. The combination of a double switchblade formed of two longitudinal members, said members being oppositely bulged at their handle ends and having short extremities flatly engaging each other and projecting lon- Even if the securing-nuts 12 should gitudinally from the blade bulges, said ex- In testimony whereof We aflix our signa tremibies being longitudinally apertured, a tures in presence of two Witnesses. handle member notched to receive the said JOHN A. WVRIGHT. projecting blade extremities, and a screw ex- WM. F. ONEILL.

5 tending through said aperture and securing \Vitnesses:

together the blade and handle member, snb- THOMAS MILES,

stanoially as shown and described. JOSEPH A. CHRISTY. 

